<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品区" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'"
        :before-leave="beforeTableLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
               <el-cascader v-model="addForm.goods_cat"
               :options="cateList"
               :props="cateProps"
               @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
            :action="uploadUrl"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture"
            :headers="headerObj"
            :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
    title="图片预览"
    :visible.sync="previewVisible"
    width="50%"
    >
    <img :src="previewPath" alt="" width="100%">
    </el-dialog>
  </div>
</template>

<script>
// import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex:0,
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        goods_cat:[],
        pics:[],
        goods_introduce:'',
        attrs:[]
      },
      addFormRules:{
        goods_name:[{
          required:true,message:'请输入商品名称',trigger:'blur'
        }],
        goods_price:[{
          required:true,message:'请输入商品价格',trigger:'blur'
        }],
        goods_weight:[{
          required:true,message:'请输入商品重量',trigger:'blur'
        }],
        goods_number:[{
          required:true,message:'请输入商品数量',trigger:'blur'
        }],
        goods_cat:[{
          required:true,message:'请选中商品分类',trigger:'blur'
        }]
      },
      //数据分类列表
      cateList:[],
      cateProps:{
        expandTrigger: 'hover',
        label:'cat_name',
        value:'cat_id',
        children:'children'
      },
      //动态参数数据
      manyTableData:[],
      //静态属性数据
      onlyTableData:[],
      //图片上传地址
      uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj:{
        Authorization:window.sessionStorage.getItem("token")
      },
      previewPath:'',
      previewVisible:false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList(){
      const{data:res}=await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.cateList=res.data
    },
    handleChange(){
      if(this.addForm.goods_cat.length!==3){
        this.addForm.goods_cat=[]
      }
    },
    beforeTableLeave(activeName,oldActiveName){
      // console.log(activeName);
      // console.log(oldActiveName);
      if(oldActiveName==='0' && this.addForm.goods_cat.length!==3)
      {
        this.$message.error('请先选择商品分类')
        return false
      }

    },
    async tabClicked(){
      if(this.activeIndex==='1'){
        const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
          params:{sel:'many'}
        })
        if (res.meta.status !== 200) {
        return this.$message.error("获取动态参数列表失败");
        }
        res.data.forEach(item=>{
        item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(' ')
        })
        this.manyTableData=res.data
      }else if(this.activeIndex==='2'){
        const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
          params:{sel:'only'}
        })
        if (res.meta.status !== 200) {
        return this.$message.error("获取静态属性列表失败");
        }
        this.onlyTableData=res.data
        console.log(this.onlyTableData);
      }
    },
    //处理图片预览效果
    handlePreview(file){
      this.previewPath=file.response.data.url
      this.previewVisible=true
    },
    //处理移除图片的操作
    handleRemove(file){
      const filePath=file.response.data.tmp_path
      const i=this.addForm.pics.findIndex(x=>{
        x.pic===filePath
      })
      this.addForm.pics.splice(i,1)
    },
    //监听图片上传成功事件
    handleSuccess(response){
      const picInfo={pic:response.data.tmp_path}
      this.addForm.pics.push(picInfo)
    },
    add(){
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          return this.$message.error('请填写必要的表单项')
        }
        //const from = _.cloneDeep(this.addForm)
        const form = JSON.parse(JSON.stringify(this.addForm))
        form.goods_cat=form.goods_cat.join(',')
        
        this.manyTableData.forEach(item=>{
          const newInfo={
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item=>{
          const newInfo={
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs=this.addForm.attrs
        console.log(form);
        //发起请求
        //商品名称唯一
         const {data:res}=await this.$http.post('goods',form )
         if (res.meta.status !== 201) {
           console.log(res);
           return this.$message.error("添加商品失败");
          }
           this.$message.success("添加商品成功");
           this.$router.push('/goods')
      })
    }
  },
  computed:{
    cateId(){
      if(this.addForm.goods_cat.length===3){
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0 5px 0 0 !important;
}
.btnAdd{
  margin-top: 15px;
}
</style>